Patents by Inventor Laurence J. Holt

Laurence J. Holt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20230302862
    Abstract: A spring configuration comprises a cylindrical damper (5), a primary coil spring (9) with a first predetermined spring rate K1, and a secondary coil spring (11) with a second predetermined spring rate K2, the coil springs arranged about the cylindrical damper (5) in series so as to provide a total combined spring rate KT, an actuator (20) configured to compress and decompress the coil springs (9, 11), a stop (12) configured to deactivate the secondary coil spring (11) at a stop position, such that, when the system is in a first, comfort, mode, the overall suspension spring rate is defined by the series equation 1/KT=1/K1+1/K2, and when the system is in a second, handling, mode, the overall vehicle suspension spring rate is defined by the series equation KT=K1, thus selectively and switchably providing both a low rate, optimal ride comfort setting and a high rate, optimal handling lower ride height setting.
    Type: Application
    Filed: August 21, 2020
    Publication date: September 28, 2023
    Inventors: Michael Francis Anthony Adamovsky, Laurence J. Holt
  • Patent number: 10807434
    Abstract: A selectively switchable dual rate vehicle suspension system comprising a pushrod actuated inboard spring configuration, conventionally oriented between the unsprung mass and the sprung mass of one corner of the vehicle, comprising a torsion bar spring of a first predetermined rate, K1, and a coil spring of a second predetermined rate, K2, arranged in series so as to provide a total combined spring rate KT.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: October 20, 2020
    Assignee: Multimatic Inc.
    Inventors: Laurence J Holt, Damian O'Flynn
  • Publication number: 20190009632
    Abstract: A selectively switchable dual rate vehicle suspension system comprising a pushrod actuated inboard spring configuration, conventionally oriented between the unsprung mass and the sprung mass of one corner of the vehicle, comprising a torsion bar spring of a first predetermined rate, K1, and a coil spring of a second predetermined rate, K2, arranged in series so as to provide a total combined spring rate KT.
    Type: Application
    Filed: January 6, 2017
    Publication date: January 10, 2019
    Inventors: Laurence J Holt, Damian O'Flynn
  • Publication number: 20180328097
    Abstract: A power assisted automotive door system has a power drive module which includes an electric motor and integrated gearbox drive unit that provides a driving torque around the door's pivot axis. A controller is in communication with the electric motor, a torque sensor, a velocity sensor, and an accelerometer and processes measured and provided data and to predict a door torque using a real-time simulation. The controller commands the power drive module to produce a compensating torque that achieves a predetermined desired resistive door torque that corresponds to a desired door velocity in response to an operator's manual operation. The operator can move the door at any desired velocity only having to overcome the predetermined desired resistive door torque allowing the door to feel as if the vehicle is on flat and level ground.
    Type: Application
    Filed: November 11, 2016
    Publication date: November 15, 2018
    Inventors: Laurence J HOLT, Paul R WHITE
  • Patent number: 8800732
    Abstract: A hydraulic damper assembly includes a main body, a shaft assembly and a main piston operatively configured to define an upper portion and a lower portion within the main body. A hydraulic damper spool valve is adapted to provide a single path, variable hydraulic flow restriction between the upper portion and lower portion of the main body. The hydraulic damper spool valve is configured with an array of precisely shaped flow apertures that are proportionally opened and closed by a pair of valve spools in response to the pressure differential across the main piston. The damper's pressure-flow operating characteristic is simply and predictably dictated by the geometric configuration of the shaped flow apertures. The precisely defined open area of the shaped flow apertures provides a mathematically predictable hydraulic flow restriction that operates predominately in a turbulent regime resulting in insensitivity to hydraulic fluid viscosity and consequently temperature change.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: August 12, 2014
    Assignee: Multimatic Inc.
    Inventors: Laurence J. Holt, Damian O'Flynn, Andrew Tomlin
  • Patent number: 8589026
    Abstract: An auxiliary hydraulic system for vehicles, in particular pick-up trucks, is configured to supply hydraulic fluid under pressure to both on-board and off-board auxiliary equipment such as snow plows, dump boxes and wood splitters. The auxiliary hydraulic system includes a multi-piston fluid pump with electrically selectable poppet valves and an associated microprocessor control that facilitates variable output so that a desired proportional flow can be supplied to the auxiliary equipment. The system also provides a switchable valve arrangement for directional control and an arrangement of fluid distribution pipes and detachable couplings so that a range of different auxiliary equipment can be quickly and simply connected to the system. A simple user interface is also included so that the operator can command the auxiliary equipment from either within or in close proximity to the vehicle.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: November 19, 2013
    Assignee: Multimatic Inc.
    Inventors: Laurence J Holt, Paul Lavoie
  • Patent number: 8348331
    Abstract: A structural attachment system for a cargo management system is fully integrated into the cargo bed side walls of a pick-up truck so that the only feature that is different than a standard pick-up is an array of holes along the top of the cargo bed side walls. The cargo management system also includes a wide range of different pick-up truck cargo bed mounted accessories that incorporate structural hooks that are adapted to be retained and released by the structural attachment system. Additionally, the structural attachment system provides a single point, simple method of retention and release via an actuation handle at the rear most point of the pick-up truck cargo bed. The configuration of the structural attachment system allows significant structural retention forces to be transferred from the accessories into the pick-up truck cargo bed side walls via the structural hooks.
    Type: Grant
    Filed: April 16, 2009
    Date of Patent: January 8, 2013
    Assignee: Multimatic Inc.
    Inventor: Laurence J Holt
  • Patent number: 8240689
    Abstract: A vehicle suspension system (55) is configured so as to contain all of the suspension motion control elements completely within the volume of the road wheel (100) while remotely locating the energy storage device (45) and damping device (42). An upright (60) comprises the spindle (61), brake caliper (105), and structure to hold a main strut shaft (70) parallel to a secondary strut shaft (67). The suspension's motion is controlled by the shafts which slide relative to the sprung part of the vehicle (1). The main strut shaft (70) includes a pumping piston (73). The fluid (91) displaced by the pumping piston (73) flows through a hydraulic connection (47) to a remote suspension module (40) mounted to the sprung part of the vehicle. The remote suspension module (40) hydraulically transmits the wheel motion to the remote energy storage device (45) and damping device (42).
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: August 14, 2012
    Assignee: Multimatic, Inc.
    Inventors: Laurence J Holt, Thomas Alexander Sparrow
  • Publication number: 20110042990
    Abstract: A structural attachment system for a cargo management system is fully integrated into the cargo bed side walls of a pick-up truck so that the only feature that is different than a standard pick-up is an array of holes along the top of the cargo bed side walls. The cargo management system also includes a wide range of different pick-up truck cargo bed mounted accessories that incorporate structural hooks that are adapted to be retained and released by the structural attachment system. Additionally, the structural attachment system provides a single point, simple method of retention and release via an actuation handle at the rear most point of the pick-up truck cargo bed. The configuration of the structural attachment system allows significant structural retention forces to be transferred from the accessories into the pick-up truck cargo bed side walls via the structural hooks.
    Type: Application
    Filed: April 16, 2009
    Publication date: February 24, 2011
    Applicant: MULTIMATIC INC.
    Inventor: Laurence J. Holt
  • Publication number: 20110029201
    Abstract: An auxiliary hydraulic system for vehicles, in particular pick-up trucks, is configured to supply hydraulic fluid under pressure to both on-board and off-board auxiliary equipment such as snow plows, dump boxes and wood splitters. The auxiliary hydraulic system includes a multi-piston fluid pump with electrically selectable poppet valves and an associated microprocessor control that facilitates variable output so that a desired proportional flow can be supplied to the auxiliary equipment. The system also provides a switchable valve arrangement for directional control and an arrangement of fluid distribution pipes and detachable couplings so that a range of different auxiliary equipment can be quickly and simply connected to the system. A simple user interface is also included so that the operator can command the auxiliary equipment from either within or in close proximity to the vehicle.
    Type: Application
    Filed: April 1, 2009
    Publication date: February 3, 2011
    Applicant: Multimatic Inc.
    Inventors: Laurence J. Holt, Paul Lavoie
  • Publication number: 20100259025
    Abstract: A vehicle suspension system (55) is configured so as to contain all of the suspension motion control elements completely within the volume of the road wheel (100) while remotely locating the energy storage device (45) and damping device (42). An upright (60) comprises the spindle (61), brake caliper (105), and structure to hold a main strut shaft (70) parallel to a secondary strut shaft (67). The suspension's motion is controlled by the shafts which slide relative to the sprung part of the vehicle (1). The main strut shaft (70) includes a pumping piston (73). The fluid (91) displaced by the pumping piston (73) flows through a hydraulic connection (47) to a remote suspension module (40) mounted to the sprung part of the vehicle. The remote suspension module (40) hydraulically transmits the wheel motion to the remote energy storage device (45) and damping device (42).
    Type: Application
    Filed: October 21, 2008
    Publication date: October 14, 2010
    Applicant: Multimatic Inc.
    Inventors: Laurence J. Holt, Thomas Alexander Sparrow
  • Patent number: 7530619
    Abstract: A pivotable grab handle device is movable between a stowed position, which is positioned against the main tailgate structure, and a deployed position that projects upwardly above the top surface of a lowered main tailgate structure. The grab handle device is mounted on a retainer bracket that is affixed to the top surface of the lowered main tailgate structure. The grab handle incorporates a spring-loaded latch mechanism that is cooperable with the pivot bracket when in the stowed position and cooperable with a striker plate mounted below the top surface of the main tailgate structure to fix the grab handle in the deployed position. A release lever projecting outwardly of the grab handle permits a retraction of the latch member to release the grab handle from either the pivot bracket or the striker plate to allow pivotal movement of the grab handle into the desired position.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: May 12, 2009
    Assignees: Ford Global Technologies, LLC., Multimatic, Inc.
    Inventors: Stephen L. Bruford, Laurence J. Holt, Charles Bambenek, Jeff Firzlaff, Robert A. Howell
  • Patent number: 5839742
    Abstract: A suspension system with a contained force system which concentrates loads in the suspension geometry control elements. The suspension system permits elimination of large, heavy load bearing structures in remote areas of the vehicle, use of a compact, modular structure, and combination of suspension geometry control and spring/damping in one unit. The modular suspension system for a wheeled vehicle includes a wheel and hub assembly, a relatively heavier vehicle body, an interposed energy storage medium, and a mechanism to releasably store energy in the medium upon relative movement between the wheel and hub assembly and the vehicle body.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: November 24, 1998
    Inventor: Laurence J. Holt